<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div{
            width: 100px;
            height: 100px;
            border: 10px solid green;
            box-shadow: 10px 10px 5px;
        }
    </style>

</head>
<body>

<div>

</div>

</body>
</html>